OK, I know that some people don't like "Volvo" style daytime lights. That's not my concern and I won't enter into any discussion about it so please don't even bother to write. If you have any feelings against it, write to the Institute of Advanced Motorists or your local MP or somebody to get it off your chest. Don't bother preaching to me. Thanks.
So what's the technical problem?
I knew it would be a problem before I even started. The heat from the bulb melts the plastic. By the way, the wires are PTFE insulated and attached to the bulb pins with crimp connectors suitably modified. I plan to strip off the red insulation and substitute silicone rubber if this project ever continues.
So the main problem is the VERY hot bulb.
The limited space inside the indicator housing means that the heat has nowhere to go so if I were daft enough to leave the bulb powered for more than a few minutes, the front of the housing would melt and sag. Even after 30 seconds the plastic around the hole is smoking.
I plan to reduce the voltage to the bulbs - probably by connecting the two in series. They should still be bright enough but they HAVE to run hot in order to maintain the correct tungsten atom migration pattern (so the tungsten filament doesn't get eroded).
I thought maybe I could use some sort of light pipe. A short piece of glass rod with one end ground to a dome shape and left "frosted".
Anybody have any experience of this?
I thought of fitting a "dim-dip" unit to the dipped headlamp bulbs instead. But the light would be more diffused and not as visible to the sides. Likewise the main beam bulbs.
I've also thought about putting white bulbs in the indicators and using those. Then I'd have to find some way of adding flashing orange indicators.
Maybe the halogen ones could be the idicators - that would reduce the heat problem.
Any "bright" ideas about how I might achieve this project. I thought of LEDs but it would take a lot!